Unlock instant, AI-driven research and patent intelligence for your innovation.

A preparation method of nano titanium dioxide, a photoanode and a dye-sensitized solar cell

A titanium dioxide and nanotechnology, applied in the field of dye-sensitized solar cells, can solve the problems of long preparation cycle, low production efficiency, uniform dispersion of raw materials, etc., and achieve the effects of shortening preparation cycle, improving photoelectric efficiency, and improving production efficiency

Active Publication Date: 2016-03-16
CHERY AUTOMOBILE CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the photoelectron conduction efficiency of nano-titanium dioxide thin films is generally not high, which has become an important factor affecting the development of dye-sensitized solar cells.
[0004] The prior art uses the hydrothermal method to prepare nano-titanium dioxide. During the preparation process, the raw materials are put into the hydrothermal reaction kettle. Since the hydrothermal reaction kettle is a sealed and high-pressure environment, it is impossible to mechanically stir the raw materials to make the raw materials in the water. The dispersion in the thermal reaction kettle is uniform, and the nano-titanium dioxide that is often prepared is unevenly dispersed and prone to agglomeration, and the entire preparation cycle is long, resulting in low production efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A preparation method of nano titanium dioxide, a photoanode and a dye-sensitized solar cell
  • A preparation method of nano titanium dioxide, a photoanode and a dye-sensitized solar cell
  • A preparation method of nano titanium dioxide, a photoanode and a dye-sensitized solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present embodiment provides a kind of preparation method of the titanium dioxide of nanometer, comprises the following steps:

[0027] (1) Slowly add 0.7M salicylic acid to 0.1M isopropyl titanate aqueous solution, and stir for 2 hours to obtain a colorless mixed solution, wherein the titanium ions in the isopropyl titanate aqueous solution and the added water The molar ratio of hydrogen ions in salicylic acid is 1:10. A 20wt% ammonia solution was added dropwise to the mixed solution, and stirred while adding, a milky white sol appeared, and the stirring was continued for 1 hour at room temperature to obtain a mixture, which included amorphous titanium dioxide. Wherein, the molar ratio of the hydroxide ion in the ammonia solution added dropwise to the hydrogen ion in the salicylic acid added is 3:1.

[0028] (2) Transfer all the above mixture to a hydrothermal reaction kettle, fix the filling degree of the hydrothermal reaction kettle to 60%, seal the reaction kett...

Embodiment 2

[0036] The present embodiment provides a kind of preparation method of the titanium dioxide of nanometer, comprises the following steps:

[0037](1) Slowly add 0.1M polyacrylic acid to 0.05M tetrabutyl titanate aqueous solution, and stir for 2 hours to obtain a colorless mixed solution, wherein the titanium ions in the tetrabutyl titanate aqueous solution and the added polyacrylic acid The molar ratio of hydrogen ions in is 1:5. A 20wt% ammonia solution was added dropwise to the mixed solution, and stirred while adding, a milky white sol appeared, and the stirring was continued for 2 hours at room temperature to obtain a mixture, which included amorphous titanium dioxide. Wherein, the molar ratio of hydroxide ions in the ammonia solution added dropwise to hydrogen ions in the added polyacrylic acid is 2:1.

[0038] (2) Transfer all the above mixture to the hydrothermal reactor, fix the filling degree of the hydrothermal reactor to 70%, seal the reactor tightly, and then put i...

Embodiment 3

[0041] The present embodiment provides a kind of preparation method of the titanium dioxide of nanometer, comprises the following steps:

[0042] (1) Slowly add 1M polyacrylic acid to 0.2M ammonium fluorotitanate aqueous solution, and stir for 2 hours to obtain a colorless mixed solution, in which the titanium ions in the aqueous ammonium fluorotitanate solution and the hydrogen in the added polyacrylic acid The molar ratio of ions is 2:1. A 20wt% ammonia solution was added dropwise to the mixed solution, and stirred while adding, a milky white sol appeared, and the stirring was continued for 3 hours at room temperature to obtain a mixture, which included amorphous titanium dioxide. Wherein, the molar ratio of the hydroxide ions in the ammonia solution added dropwise to the hydrogen ions in the polyacrylic acid added is 4:1.

[0043] (2) Transfer all the above mixture to the hydrothermal reactor, fix the filling degree of the hydrothermal reactor to 80%, seal the reactor tigh...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a nano titanium dioxide preparation method, a photoanode and a dye-sensitized solar cell. The method comprises the following steps of: (1) preparing amorphous titanium dioxide by using a liquid phase method to obtain a mixture of the amorphous titanium dioxide and an aqueous solution; and (2) placing the mixture into a hydrothermal reaction kettle, heating and reacting under the high-pressure and ultrasonic environments to obtain nano titanium dioxide. The nano titanium dioxide is prepared in the hydrothermal reaction kettle under the ultrasonic environment by using the method, so that the reaction product is evenly mixed and dispersed in the hydrothermal reaction kettle, the generation of the hydrothermal reaction and the production of the nano titanium dioxide can be promoted, the obtained nano titanium dioxide is evenly dispersed, no cluster phenomenon exists among titanium dioxide particles, the nano titanium dioxide is good in crystallization property, and higher in crystal purity, furthermore, the photoelectric efficiency of the dye-sensitized solar cell of the photoanode prepared by the nano titanium dioxide prepared by using the method can be improved.

Description

technical field [0001] The invention belongs to the technical field of dye-sensitized solar cells, and in particular relates to a preparation method of nanometer titanium dioxide, a photoanode and a dye-sensitized solar cell. Background technique [0002] Since the early 1990s, the research group led by Professor Greatzel of the Swiss Institute of Advanced Technology in Lausanne, applied nanoporous titanium dioxide to dye-sensitized solar cells to increase the photoelectric conversion efficiency of the cells to 6-7%, which has attracted widespread attention in the world. Because dye-sensitized solar cells have potential application advantages such as low cost, simple manufacturing process, and environmental friendliness, many commercial companies and research institutions have invested a lot of effort and increased the application research of large-area cells. [0003] The dye-sensitized solar cell is composed of the following parts: photoanode, photocathode, electrolyte, dy...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/04C01G23/053B82Y30/00H01G9/20
CPCY02E10/542Y02P70/50
Inventor 焦方方朱广燕卢磊陈效华
Owner CHERY AUTOMOBILE CO LTD